Welding apparatus



July 30, 1935.

A; B. BRUSSE ET AL 2,009,647

WELDING APPARATUS Filed Sept. 18, 1954 20 i /6 all! /4 2?." Z50 V I INVENTORJ 4J5 @Brcwse and i .14 BY J13. Carmen Patented July 30, 1935 1 UNITED STATE WELDING APPARATUS Archie Bryan Brnsse and Joseph L. Garman,

Denver, 0010., assignors, by mesne, assignments, to Rocky Mountain Metal Products 00., Denver, (3010., a corporation of Colorado Application September 18, 1934, Serial No. 744,548

15 Claims.

Our invention relates to improvements in welding machines, and more particularly to the type of welding machines generally designated as spot welding machines. T

It is an object of the present invention to provide in a device .of the above stated character,

two.series of adjustable electrodes of different.

sizes which may be selectively arranged to position any one of the electrodes in one series in current transmitting relation to any one of the electrodes in the other series without removal'of any parts from the device.

Another object of the invention is the provision of a device particularly adapted for welding appliances used in orthodontia.

A further object of the invention is the provision of independently actuated means for controlling welding temperatures, pressure of-the electrodes, and the duration of the welding operation.

Still another object of the invention is the provision in a device of the above stated character of means permitting the attachment of annealing terminals employed in adapting arch wires to plaster models in orthodontia.

Other objects reside in novel combinations and arrangements of parts as will more fully appear in the course of the following description.

Referring now to the drawing in the several views of which like partshave been similarly designated, ,xFig'ure 1 represents a fragmentary side elevation of the welding device embodying our invention,

Figure 2 is a plan view shown in Figure 1,

Figure 3, an elevation, partially in section, of one of the detachable annealing terminalsv used in connection with the welding device,

Figure 3a' is a side elevation of a terminal like that shown in'Figure 3, but without a switch.

Figure 4 represents a fragmentary side elevaof the welding device tion, partially' in section of the welding device,

inclusive of the electric circuit employed in its operation,

Figure 5 is a side elevation of'the device mounted on a standard and in operative connection with a foot p'edal pressure control,

Figure 6 is a section taken along the line 6-8, Figure 1,

Figure 7 is a section taken along the line 'I'|, Figure 4, drawn to a reduced scale, I

Figure 8 is a section taken along theline 8-8, Figure 2, and

Figure'9 is a side elevation of an employed in welding arch wires. V The welding device comprises a. casing ID of any suitable design, oneside --.of:lwhich, preferably the top, is. covered by a removable plate jl which may be of suitable non-conductive coin.-

electrode-unit position. Access to the interior of the casing I0 is provided by removal of the plate l2.

Fixedly supported on plate I! is a conductive column iii of inverted L shape. A second conductive column [4, mounted for reciprocation thru plate [2 is disposed in substantial lengthwise alinement with the extended end of column A spring-pressed turret-head IS on the extended end of column I 3 is provided with a series of laterally extending electrodes ll. Column I4 is also provided with a spring-pressed turrethead I6 having a series of electrodes [8. The turret-head I 6 has a tapered nose 20, and the electrodes it are disposed on the tapered surface and extend laterally therefrom.

It has been found advantageous to construct the turret-heads I5, and I6 as well as the electrodes IT and N3 of copper, but it isto be understood that any good conductive material may be employed. Eachturret-head andits electrodes may be of integral construction,- but under certain conditions it may be more desirable to make the electrodes as separate units to facilitate-replacement and repairs.

The electrodes may be of any preferred form, and in the drawing both the straight and oifsettype electrodes have been shown. Grooves 19 in.

the ends of-the electrodes are provided for the reception-of wires when the device is used in orthodontia.

, Pins 2| and 21a extend from the end of each.

of the columns 13 and I4 respectively, and engage anv one of a series of depressions 22. and 22a in the bearing surface 23 and turret-heads.

The electrodes oireacl'i turret-head are uni formly spaced about the periphery thereof, and

the depressions are likewise uniformly spaced upon the bearing surfaces asillustrated in Figure 6. The pins 21 and 2 la are so positioned on each of the columns that when they engage the depressions 22 and 22a, one of the electrodes on' turret-head I5 is held in axial alinement withone'of the electrodes on turret-head IS.

A control switch 24 on .platel2 permits reg- 23a of the respective ulation of the operation of a transformer 25 to control the welding temperatures. This "control is of a type well-known and in common use in the art and detaileddescription of same appears unnecessary.

A timing switch 26 closes the electric circuit employed in the operation of the device and controis the duration of the welding operation. It i i has been found desirable to have a spring-pressed actuator for switch 26, and as; illustrated in Figure 8 of the drawings, a removable push pin. 21

may be moved by manual pressure, against the l resistance of a springicontact 28 to close the circuit, and when the manual pressure is removed, the pin 21 is moved by the spring 28 to a circuit opening position.

The push pin 21 may be removed from the position shown in Figure 2 and inserted in an opening 29 as illustrated in the dotted line posi-- tion in Figure 8, where it closes the switch controlling the circuit for annealing terminals30 and 3|, illustrated in Figure 3.

Both annealing terminals 30 and 3| comprise a shell 32 of suitable insulating composition, and

an electrode tip 33 projecting from the shell;

The terminal 30 has a push pin switch 34 for closing the electric circuit. The tips 33 are connected by suitable conductors 35 with contact plugs 36 which are inserted in terminal sockets 31 when the terminals are to be used. The tips may be grooved, if desired, for engagement with arch wires in orthodontic work. These grooves are similar to the groove I9 in electrode I'I, illus trated in Figure 2 and further description appears unnecessary.

The electrode-unit 38 illustrated in Figure 9 comprises two electrodes 39 supported in a. yoke 45. At their upper extremities, the electrodes are in converging relation with their end portions spaced apart, and when desired, the end-portions may also be grooved to receive an arch wire which bridges the gap between the ends. The opposite ends of the electrodes 39 are fitted in the terminal sockets 31 when the unit is in use.

Reciprocation of column I4 may beefiected by any suitable mechanism, and as illustrated in Figure 5, theparticular means for efiecting reciprocation, is a foot pedal 4|.

'I'hecolumn I4 is fitted within a sleeve 42 inside casing I0. A coil spring 43 embraces sleeve 42 and is held in place by abutments 44 atopposite endsthereof. A slot 45 extending lengthwise of sleeve 42 provides a guideway for a pin 46 projecting from column I4; The/pin 46 over- .hangs the spring 43. The end of column I4 within the casing I 0 terminates in an apertured lug 47.

A rod 48 connects the lug 41 with foot pedal 4 I, and whenever pressure is applied to the pedal, the pin 46 engages coil spring 43 and the column I4 is moved thru the sleeve against the resistance of the spring. In this manner, the turret-heads I5 and I6 are separated sufiiciently to permit adjustment. When pressure is removed from pedal 4|, the spring returns column I4 to its normal position, as illustrated in Figures 1 and 4.

Suitable conductors 49 and 50 connect the inner ends of columns I3 and I4 with the transformer 25, which is connected by a conductive cable 5| with a suitable source of electricity 52.

After the turret-heads I5 and I6 have been separated as explained hereinabove, each turretthis position, the pin.2I or 2 Ia. will engage one of the depressions 22 or 22a and upon release of the turret-head, its spring will return it to its normal position, illustrated in Figure 4.

By the above adjustment, it is possible to position any one of the electrodes I! in working rela-' tion to any one of the electrodes I 8.

The circuit for the device, as illustrated in Figure 4 comprises a transformer 25, having its primary coil connected by suitable conductors with a suitable source of electricity 52. The switch 26 closes the circuit between the source 52 and the transformer 25. The secondary coil of transformer 25 is connected by suitable conductors with the conductive columns I3 and I4, and also with .the terminal sockets 31.

In the operation of the device, the foot pedal 4| is depressed, and the turret-heads I5 and I6 are manually rotated until the selected electrodes are brought into operative alinement. The work is inserted between the electrodes, and pressure on the work is regulated by actuation of the foot pedal. The temperature control 24 is regulated as desired, and the circuit is closed by depressing push pin 21. When the desired welding operation is completed, pressure on push pin 27 is released and the circuit is again opened as hereinabove explained.

If the annealing terminals 30 and 3! are to be used,-the turret-heads I5 and I6 are separated and maintained in separated relation by turning one of the turret heads to a position in which its electrodes are out of engagement with the electrodes of the other turret-head.

The contact plugs 36 are inserted in terminal sockets 31, the terminals 30 and 3| are applied to the work and the circuit is closed and opened by actuation of switch 34.

When the electrode-unit 38 is to be used, the unit is fitted in terminal sockets 37, and the work is placed across the exposed ends to bridge the gap between the same. opening 29, where it maintains the circuit continuously closed. One of the annealing terminals The push pin 2! is inserted in or any other suitable tool may be employed to con- 1. Welding apparatus comprising two supports,

a turret-head oneach support, a series of electrodes on each turret-head, the turret-heads being disposed on their respective supports with' an electrode on one turret-head in alinement with an electrode on the other turret-head, and pressure means normally holding the alined electrodes in engagement. Y

2. Welding apparatus comprising two supports, a turret-head on each support, a series of electrodes on each turret-head, the turret-heads being disposed on their respective supports with an electrode on one turret-head in alinement with an electrode on the other turret-head, and means for moving the electrodes into and out of engagement.

3. Welding apparatus comprising two supports,

- a turret-head mounted for rotary adjustmenton each support, a series of electrodes on each turret-head, the turret-heads being disposed on their respective supports with an electrode on one turret-head in alinement with an electrode on the other turret-head, means for holding the turretheads in adjusted positions and pressure means normally holding the alined electrodes in engagement. I

4. Welding apparatus comprising two supports, a turret-head mounted for rotary adjustment on each support and for axial movement relative thereto, a series of electrodes on each turret-head,

} the turret-heads being disposed on their respective supports with an electrode on one turrethead in alinement with an electrode on the other turret-head, means releasable by an axial movement of each turret-head relative to its support for holding it in adjusted positions and pressure means normally holding the alined electrodes in engagement.

5. Welding apparatus comprising two supports, a turret-head on each support, a series of electrodes on each turret-head, the turret-heads being disposed on their respective supports with an electrode on one turret-head in lengthwise alinement with an electrode on the other turret-head, and pressure means normally holding the alined electrodes in engagement.

6. Welding apparatus comprising a fixed support, a movable support, a turret-head on each support, a series of electrodes on each turret-head, the turret-head's being disposed on their respective supports with an electrode on one turret-head in alinement with an electrode on the other turret-head, a spring on the movable support normally holding the alined electrodes in engagement, and means for moving the latter support against the resistance of its spring to thereby separate the electrodes.

7. In welding apparatus, a support, a springprcssed turret-head on the support, an electrode on the turret-head. and a pin projecting from the bearing surface of the support, there being a depression in the bearing surface of the turret-head to receive the pin, and the pin being held in engagement with the depression by pressure of the spring urging the turret-head toward the support, to thereby maintain the electrode in a determinate position.

8. In welding apparatus, a support, a springpressed turret-head on the support and mounted for rotary and axial movement relative thereto, an electrode on the turret-head, and a pin projecting from the bearing surface of the support, there being a series of depressionsin the bearing surface of the turret-head, the pin engaging the respective depressions during rotation of the turret-head, and being held in selective positions by pressure of the spring urging the turret-head toward the support.

9. In welding apparatus, an apertured casing, and an electrode support movably fitted in the aperture of the casing and comprising a slotted sleeve suspended from the casing within the same, abutments at opposite ends of the sleeve, a coil spring on the sleeve between the abutments, a column slidably fitted in, the sleeve and extending through the aperture in the casing, a pin on the column movable in the slot and overhanging the spring, an electrode on the exposed end 01' the column, and means for moving the column against the resistance or the spring, to thereby move the electrode to selected positions.

10. In welding apparatus, an apertured casing, and an electrode support movably fitted in the 'apertureof the casing and comprising a slotted sleeve suspended from the casing within the same, abutments at opposite ends of the sleeve, a coil spring on the sleeve between the abutments, a

. column slidably fitted in the sleeve and extending through the. aperture in the casing, a pin on the column movable in the slot and overhanging the spring, an electrode onvthe exposed end of the column, and manually operable means for moving the column against the resistance of the spring, to thereby move the electrode to selected positions.

11. A welding device comprising two conductive I supports, a conductive turret-head on each support, a series of electrodes on each turret-head, the turret-heads being disposed on their respective supports with an electrode on one turret-head in current-transmitting relation to an electrode on the other turret-head, and an electric circuit in which the respective supports are connected.

12. A welding device comprising two conductive supports, one of said supports being movable rela-- tive to the other, a conductive turret-head on each support, a series of electrodes on each turrethead, the turret-heads being disposed on their respective supports with an electrode on one turrethead normally in current-transmitting relation to an electrode on the other turret-head, an electric circuit in which the respective supports are connected, and means for moving the movable support to thereby separate the electrodes.

13. Welding apparatus comprising a casing, a support of inverted L shape fixedly mounted on the casing, a second support mounted for reciprocation. in the casing and having one of its ends projecting through the casing, a. turrethead on the L shaped support having its axis of rotation at substantially a right angle to the lengthwise axis of the reciprocating support, a turret-head on the projecting end of the reciprocating supp rt having its axis of rotation at an acute angle to the lengthwise axis of the sup port, a series of radially disposed electrodes on electrodes on the other turret-head projecting outwardly therefrom at an acute angle to its axis of rotation, whereby during rotation of the respective turret-heads, two of the electrodes are brought into' lengthwise alinement.

14. Welding apparatus comprising a casing, a support of inverted L shape fixedly mounted on the casing, a second support mounted for reciprocation in the casing and having one of its ends projecting through the casing, a turret-head on the L shaped support having its axis of rotation at substantially a right angle to the lengthwise axis of the reciprocating support, a turret-head on the projecting end of the reciprocating support having its axis of rotation at an acute angle to the lengthwise axis of the support, a series of radially disposed electrodes on the first-men tioned turret-head, and a series of electrodes on the otherturret-head projecting outwardly therefrom at an acute angle to its axis of rotation, whereby during rotation of the respective turretheads, two of the electrodes are brought into lengthwise alinement in engaging relation.

15. Welding apparatus comprising a casing, a support of inverted L shape fixedly mounted on the casing, a second support mounted for reciprocation in the casing and having one of its ends projecting through the casing, a turret-head on the L shaped support having its axis of rotation at substantially a right angle to .the lengthwise axis of the reciprocating support, a turret-head on the projecting end of the reciprocating supporthaving its axis of rotation at an acute angle to the lengthwise axis of the support, 9, series of radially disposed electrodes on the first-mentioned turret-head, a series of electrodes on the other turret-head projecting outwardly there! from at an acute angle to its axis of rotation, whereby during rotation of the respective turret-heads, two of the electrodes are brought into lengthwise alinement, and means for locking the turrets with the eletcrodes in the alined position.

ARCHIE B. BRUSSE. JOSEPH L. CARMAN. 

